Me cago en tus muertos = I shit on your ancestors / I shit on your dead relatives.
Me cago en todos tus muertos = I shit on all of your ancestors / I shit on all of your dead relatives.
And in the theme of insults from Spain, a loaded one is also:
Me cago en tu puta madre = I shit on your fucking mother / I shit on your whore mother
See, the thing with “puta/puto” is that it literally means “whore”, but it’s used to empathize cursings just like “fucking” is used in english. We’re even misusing it by putting it before verbs, imitating it’s use in english.
That’s not exact:
And in the theme of insults from Spain, a loaded one is also: Me cago en tu puta madre = I shit on your fucking mother / I shit on your whore mother
See, the thing with “puta/puto” is that it literally means “whore”, but it’s used to empathize cursings just like “fucking” is used in english. We’re even misusing it by putting it before verbs, imitating it’s use in english.